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Subsequent events to December 31, 2017 - Reversal of Reserve (Details) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 30, 2018 ARS ($) | Feb. 15, 2018 ARS ($) $ / shares | Jan. 31, 2018 ARS ($) installment | Dec. 31, 2017 ARS ($)
Subsequent events to December 31, 2017 |  |  |  |
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners |  |  |  | $ 1,989,000,000
Telecom Argentina | Major ordinary share transactions |  |  |  |
Subsequent events to December 31, 2017 |  |  |  |
Equity reclassified into financial liabilities | $ 6,866,418,019 | $ 2,863,000,000 |  |
Number of distributions | installment |  |  | 2 |
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners |  | 13,006,505,599 |  |
Dividends paid corresponding to the net profit from January 1 - September 30, 2017 |  | $ 5,640,728,444 |  |
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share | $ / shares |  | $ 6.04 |  |
Telecom Argentina | Voluntary reserve for future dividends payments | Major ordinary share transactions |  |  |  |
Subsequent events to December 31, 2017 |  |  |  |
Equity reclassified into financial liabilities |  |  | $ 9,729,418,019 |
Telecom Argentina | Cablevision Holding S.A. | Major ordinary share transactions |  |  |  |
Subsequent events to December 31, 2017 |  |  |  |
Dividends paid corresponding to the net profit from January 1 - September 30, 2017 |  | $ 4,502,777,155 |  |

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